[INFO] updating cached repository crsaracco/rtb-rs-tester
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/crsaracco/rtb-rs-tester
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/crsaracco/rtb-rs-tester" "work/ex/beta-1.38-1/sources/1.37.0/gh/crsaracco/rtb-rs-tester"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/crsaracco/rtb-rs-tester'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/crsaracco/rtb-rs-tester" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crsaracco/rtb-rs-tester"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crsaracco/rtb-rs-tester'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fa8909d99c4b98d9f99f8d74c9daa6682fbafc55
[INFO] sha for GitHub repo crsaracco/rtb-rs-tester: fa8909d99c4b98d9f99f8d74c9daa6682fbafc55
[INFO] validating manifest of crsaracco/rtb-rs-tester on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of crsaracco/rtb-rs-tester on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing crsaracco/rtb-rs-tester
[INFO] removed path dependency rtb-rs from crsaracco/rtb-rs-tester
[INFO] finished frobbing crsaracco/rtb-rs-tester
[INFO] frobbed toml for crsaracco/rtb-rs-tester written to work/ex/beta-1.38-1/sources/1.37.0/gh/crsaracco/rtb-rs-tester/Cargo.toml
[INFO] started frobbing crsaracco/rtb-rs-tester
[INFO] removed path dependency rtb-rs from crsaracco/rtb-rs-tester
[INFO] finished frobbing crsaracco/rtb-rs-tester
[INFO] frobbed toml for crsaracco/rtb-rs-tester written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/crsaracco/rtb-rs-tester/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/crsaracco/rust-vst.git`
[INFO] [stderr] error: failed to load source for a dependency on `vst`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/crsaracco/rust-vst.git?branch=open-editor-return-1-for-success
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to fetch into /mnt/big/crater/work/local/cargo-home/git/db/rust-vst-02af190f7b127471
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to authenticate when downloading repository
[INFO] [stderr] attempted to find username/password via git's `credential.helper` support, but failed
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to acquire username/password from local configuration
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed